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“The new guidelines are a huge step forward,” said Dr. William P. Meehan III, director of the Sports Concussion Clinic at Harvard-affiliated Boston Children’s Hospital, who was not involved creating the new guidelines. “They summarize the best of what we now know about concussion.”

The guidelines step away from trying to “grade” concussions or diagnose them on the field or sidelines. Instead, they focus on immediately removing from play athletes who are suspected of having a concussion until they can be evaluated.

The AAN estimates that concussions cause between 1.6 million and 3.8 million mild brain injuries each year. Concussions happen when something makes the head and brain move quickly back and forth. This can be a jolt to the head, a fall, or a blow to the body. The injury changes how the brain functions. Many athletes don’t get medical attention for these injuries, often because they or their coaches don’t recognize the warning signs or take them seriously.

Concussions are most common in males playing American football or rugby (Dr. Meehan says ice hockey also tops the list) and in females playing soccer or basketball. However, concussions can happen in any sport.

Concussion is a clinical diagnosis. It isn’t something that can always be identified on the field using one of the numerous symptom checklists or scoring systems that are currently available.

Athletes who seem to have suffered a concussion should be immediately removed from play and evaluated.

Athletes who have sustained concussions should not return to play or activity that has a risk of contact activity until a licensed healthcare provider “had judged that the concussion has resolved.” Light exercise may be started beforehand as long as there is no contact risk. The AAN did not set a timeline for safe return to play.

Athletes who have had one concussion are at greater risk of having another. The first 10 days after a concussion is a period of special danger.

Athletes with multiple concussions and lingering symptoms should undergo testing. Some should be counseled to retire from play.

Spotting concussions

The new AAN guidelines differ from the old ones in a key way. “These are solid, evidence-based guidelines based on what we know about concussion, while the earlier ones were more a consensus statement of what we believed,” said Dr. Ross Zafonte, a member of the panel that developed the new guidelines and chair of the Department of Physical Medicine and Rehabilitation at Harvard Medical School.

That doesn’t mean the new guidelines are perfect. Rigorous research in concussion was scarce until a decade or so ago, and researchers still have a lot to learn about how concussions damage the brain, how best to prevent them, and how to treat them. But the AAN’s new effort is a good start.

Needed even more are clear guidelines for coaches and athletic trainers, the people who have ring-side seats to watching concussions happen and trying to deal with their aftermath. To make the guidelines truly useful, the next step for the AAN should be to translate the guidelines for coaches and trainers.

In the meantime, for any player with a suspected concussion or showing the symptoms below, “If in doubt, sit it out,” said Dr. Jeffrey S. Kutcher, co-leader of the AAN guidelines panel and associate professor of neurology at the University of Michigan Medical School. “If headaches or other symptoms return with the start of exercise, stop the activity and consult a doctor.”

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The contents displayed within this public group(s), such as text, graphics, and other material ("Content") are intended for educational purposes only. The Content is not intended to substitute for professional medical advice, diagnosis, or treatment. . . .